<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box{
            margin:0 auto;
            border: 1px solid black;
            background: orangered;
            height: 300px;
            width: 300px;
        }
        .xbox{
            border: 10px solid hsla(0, 0%, 100%,.5);
            background: white;
            width: 100px;
            height: 100px;
            margin: 85px auto;
            background-clip: padding-box;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="xbox">
        </div>
    </div>
</body>
</html>